Indicating and recording nonreturn valve



July 3, 192s. 1,615,523

D. R. YARNALL INDIGATING AND RE'CORDINGUNONRETURN VALVE Filed April l0, 1924 ,m Ng

v* Hummm Y i l Ag/ i Patented July 3, 1928.

f UNITED lSTATES 1,675,523 PATENT OFFICE.

DAVID ROBERT YARNALL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO 'YAR- NALL-WARING COMPANY,

PENNSYLVANIA.

OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF INDICATING AND RECORDING NONRETURN VALVE,

Application ined April 10,1924. sei-iai No. 705,473.

indicate the position of a non-return valve.

A further purpose of my invention is to utilize thenon-return valves as ow meters tion by but two forms varied for the pui`1` pose only of suiting different types of valves, both forms of which are practical, eiiicient and inexpensive and which at the same time well illustrate the yprinciples of my invention. n f y Figure 1 is a vertical section through a non-return valve of the angle type showingY recording connections, the section being on line 1-1 of Figure Figure Qis a section of Figurevl taken upon lme 2-2- Figure 3 Vis a section of the invention applied to a. globe type of valve.

In the drawings similar numeralsindicate like parts. a

Describing in illustration and not in limitation and referring to the drawings As is well known, non-return valves may be closed positively against flow of steam from the individual boilers to the header or manifold but cannot be opened positively7 depending for their opening upon an eX- cess of pressure upon the valve element from the side of the individual boiler as compared with the pressure upon the upper side of the valvey from the header. No means has been provided prior to my invention for determining the position of the valve except as its extent ofl possible opening could be limited and as it could be held closed.

It has been customary in many plants to use flow meters in series with the non-return valves, one in each connection, between each boiler andthe header.

Dependence has been placed upon the flow meters to determine the performance of the individual boilers both comparatively and quantitatively. My invention is intended by indicating and preferablyrecording the position of the movable element to roughly show the flow of steam through the non-return valve, and vto determine the performance of the boilers b v the position of the nonreturn valves. This not only kgives lcomparative performance of the different boilers but provides measure of iiow of steam with a. fair degree of accuracy.

Describing the form shown in Figure 1, anon-return valve is illustrated in which the-body 5 has inlet 6 from the boiler and outlet- 7 to the manifold. A removable valve seat isshown at S and the valve element 9 isl connected with a cuppedpiston 10 by stem 11. The pistou floats and loosely travelsl within cylinder 1Q and is supplied with steam through its loosefit in thc cylinder. or/and through any small port 123.

The cylinder depends from a cover plate 14 upon which lis supported' a yoke l5 threadedvin its outer end 16. lVithin the Vthreaded rend is secured a controlling stem As thus far described the non-return valve is vnot intended to diil'er from other nonvwhen the pressure of the boiler is above that of the headerbut the valve will close automatically by weight when the pressure in the boiler falls and will close suddenly with any sudden flow of steam from the manifold toward the boiler. The valve can be limited in its opening or can be positively closed as shown in Figure 1 by screwing down the stem 17 as by handle 23.

For the 'purpose of indicating and desirably recording the position of the non-return valve, using the indication or record with a calibration curve or chart to obtain meter readings I provide operating connection between a movable part of the valve and an indicating and preferably recording member outside of the valve casing. As shown in Figure 1 this connection conveniently engages the neck of the valve.

Here the arm 24 is yoked at they end as Y' at 25 and is provided with pins 26 retained in position by nuts 27 so `as to project wit-hin the groove 28. The arm is pivoted' at 30 to swing upwardly and downwardly withMv Y ofgbeing-connected to swing about acenter.'r

" Because of thefsha-pe ,of the globelva-lve movement of the'floating-'valve 1 Y 1 Thel outeifend-V of the arm 24 carries a sleeve 29 which is secured to swing with a shaft 30 passing through the wall of the casing and protectedzfro-m steam vleakage by packing 31, held in place by a gland 32.

, The shaft has bearing at4 its inner'end 33 and at its outer end as preferred against themetal of theyalv'eas at 34 'orin'the gland 32.

he mounting of the mechanism is facili'- tated by providing a compartment Y oppositel` the stem which compartment is shown as havingsidewalls 35,35 and endwall 37.

The sleeve' preferably fits Vbetween finished faces 38, v39within,the-side walls; so as to prevent end'mo'vement. Y The shaft is 'kept in place by a set screw. 4() passingthrough Y the sleeve and imp'inging fagainst the shaft.

This' construction is' readilyv assembled byV insertion' ofithe shaftl through the sleeve in position vand fastening the set screwbefore the cover l4 isapplied andcantilng' orlateral movement of the valve may lie given to" engageitheepins 26'within the groove 28 in" they stem.

Upon the 'projecting outer end of thesha'ft' .30, I mount an ar'1'n4l which is effectiveas' an indicator'by reason ofitsv position andv which. also carries a recording vpen 42'and inkholder 43 by' which record ism'adeupon the chart 44 carried by va rotor' recording drum Q45.` The' standard fo'thisidrum isindicated at 4G andi is 'intentiledftoicarry the Yusual. mechanism for rotating" the' ldrum. Since this is wellk'nown in the recording art and need not be' ofany special icoi'istruc- Y tion but'can belof standardstockfit ha'snot e been deemed necessary to illustrate it fur.n

` ther than as indicated including the winding Vstem 47. y l. l

The recording'druin vis supporteduponv a 'bracket 48 preferably Y mounted upon the valve so. astomake `the unit self-contained'. In Figure 3 the non-returnV valvev 1s in`- the extended stem passes directlythrdugh the bottom of the valve body where it is vprotected against leakage' by packing 3lV and gland 32.V In this casethe pens 42 and Fink holder 43"arefcarried 'by a bracket 49 secured to and movable directly with the extendedstem '202. TheVv record drinn' 45 is 'shown a'sfsupported from a "bracket48" se'-` cured to the 4flalnge 50ofi`the'rva`lve or from* any, fixedV bracket 5l'y orfby meansof *bothv of these supports as desired, the `manner of' support being immaterial.

It will be noted'that the movementV of theV pen in Figure valve.

the movable elements whilepiessed open bration normally present att-hese valves. As variations and changesfm thef application ofV my invention will occur/to others skilled in the art,4 reading my dis'closuiea'nd in view of their own whims and`preferences,A 1t is myintention to cover hereurall suchy modifications and changes asi come :within the reasonable spirit and scope ofmy claim.

Having. thus described-my inventiomwhat i I ClaimV as'new and desireto Vsecure' by Liet# ters Patent is y Y Y `A' non-return' stop andV check valve `of the globe type having adamper upon thezvalve,

in combination with a valve stemv'therefiom f passing through the body vofthe valve7 packing ltherefor andfV recording,lr

4 f connections mounted upon the' said stem.

'Dfrvin' Bonner Y YARNALL; i

3 is'thefsame as 'thatjof the In either typev of v/valvef shown," adapta-A `tion as "af 'meter depends upon the movable valve element floating. e the streaml ,of steam, pressed toward closure''by Weight of fao 

